docs: def Sensitivity(self):
          """Sensitivity spectrum to convert flux in
          :math:`erg \\; cm^{-2} \\; s^{-1} \\; \\AA^{-1}` to
          :math:`count s^{-1} \\AA^{-1}`. Calculation is done by
          combining the throughput curves with
          :math:`\\frac{h \\; c}{\\lambda}` .
  
          Returns
          -------
          sensitivity : `~pysynphot.spectrum.TabularSpectralElement`
  
          """
          sensitivity = spectrum.TabularSpectralElement()
  
          product = self._multiplyThroughputs()
  
          sensitivity._wavetable = product.GetWaveSet()
          sensitivity._throughputtable = product(sensitivity._wavetable) * \
                                        sensitivity._wavetable * self._constant
  
          return sensitivity